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dc.contributor.authorIbrahim, J I
dc.contributor.authorGuseva, A
dc.contributor.authorGarcia-Mayoral, R
dc.date.accessioned2020-06-10T15:56:05Z
dc.date.available2020-06-10T15:56:05Z
dc.date.issued2020-04
dc.identifier.issn1742-6588
dc.identifier.otherjpcs_1522_1_012015
dc.identifier.otherj15221015
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/306666
dc.description.abstractAbstract: We investigate the effect of controlling large-scale, logarithmic-layer turbulent structures, which have a characteristic size and aspect ratio that scale with the distance from the wall. The aim is to quantify the effect of suppressing these structures while leaving the near-wall turbulent dynamics unaltered. By affecting only the logarithmic-layer structures, it might be possible to isolate their contribution to the drag from that of the other scales in the flow. We conduct direct numerical simulations of turbulent channel flows at friction Reynolds number ReT ?s 500-1000 and artificially remove certain streamwise and spanwise wavelengths of the wall-normal velocity across a range of heights. The wavelengths chosen depend on the target height (and size) of the structures that we wish to target. When these wavelengths are removed, we observe a positive, outward shift of the mean velocity profile above the target height, due to a local reduction in Reynolds shear stress, and a subsequent increase in viscous stress. Our preliminary results suggest that this shift in the mean velocity profile scales in outer units.
dc.languageen
dc.publisherIOP Publishing
dc.rightsAttribution 3.0 Unported (CC BY 3.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subjectPaper
dc.titleSelective opposition-like control of large-scale structures in wall-bounded turbulence
dc.typeArticle
dc.date.updated2020-06-10T15:56:04Z
prism.issueIdentifier1
prism.publicationNameJournal of Physics: Conference Series
prism.volume1522
dc.identifier.doi10.17863/CAM.53753
rioxxterms.versionofrecord10.1088/1742-6596/1522/1/012015
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/3.0/
dc.identifier.eissn1742-6596


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Attribution 3.0 Unported (CC BY 3.0)
Except where otherwise noted, this item's licence is described as Attribution 3.0 Unported (CC BY 3.0)